Helically-riffled pipe.



PATENTED JUNE 18, 1907. l

J. D. ISAAGS & J. SPEED HBLIU'ALLY RIFFLED PIPE.

APPLIOATION FILED JUNE 23. 1905.

UNrrED ,sTArEs PATENT 1 OEEIOE. l

JOHN DOVE isi/ics, or oAKLAEo, Aun JAMES BUOENER SPEED, or EERKEn LEY, CALIFORNIA, AssreNoias To EiELED PIPE cOMrANY, or SAN ERAN- cisco, CALIFORNIA, A ooEPoEA'rrON or CALIFORNIA.

Specification of Letters atent.

Patented Tune 1S, 1907.

Application filed lune 23. 1905 Serial No. 266,574.

To nil whom, 251'; man cm1/cern,.-

Be it known that we, JOHN Dove issu-ics, a citizen of the United States, and a residentof Oakland, Alameda county, State oi' (/alifornia, and JAMES BUOKNER SPEED, a citizen ci the United States, and a resident of Berkeley, Alameda county, State of California, have invented certain new and useful improvea second iuid of greater specific gravity,

through the pipe, with a helical motion about the axis of the iluid content, whereby the iluid of greater specific gravity is caused to forni an envelop about the iluid of lesser speciiic gravity, thereby reducing the {riction against 'the pipe Waiis. This art or method is 'lully disciosed in Letters Patent oi' the United. States No. 759,374., granted to us May l@ i904, to which patent reference is hereby made. In this method, the necessary heiicalinotion of the Huid content of the pipe is, in practice, produced. by `means of a helically directed obstruction ot some kind, upon and thrfmghout the interior of the pipe iine. We have found that a certain form and construction. of the helical obstruction within the pipe is Well adapted 'for the purpose. in that it effects the .necessary motion with facility and maintains it with accuracy.

Our present invention has for its object the provision oi pipe to be used in constructing a pipe line for this purpose., Which is economical in its nmnu'lacturc and effective in securing the result desired.

To this end, our invention consists in the novel pipe which We shall now describe, by reference to the accompanying drawings, in Which Figure 1 is an elevation, partly broken, of a piece of our improved pipe.' F'g. 2 is an elevation showing the apparatus in Which the pipe-line is used, 'for carrying out the method stated. Fig. 3 is a cross section of'ourimproved pipe-line.

The pipeeline consists of a plurality of sections suitably coupled together. A part of one of tliesesections A is here shown. The interior of the pipe is iitted with a helically directed Wire a Which forms the riffle. This wire, in practice, is spring wire and is fitted to place, by being drawn through any given section or any given length of the pipe line. it is fed in from one end. frein a roll 'of wire, and pulled through from the other end. Vhen the pulling strain is relieved, the Wire, of its own resiliency, Will spring outwardly to seat and hold itself against the4 interior of the pipe in a helical course of more or less pitch, according to the character of the wire and the pulling strain With Which it is drawn through the pipe in seating it.

. B isthe pump by which the lighter iuid is supplied to the pipe-line, and C is the pump by which the heavier fluid is supplied to the said line.

Having thus described our invention, what We claim as new and desire to secure by Let* ters Patent is i. A duid pipe lline having a relatively rigid interior Wall, and a helically directed spring wire seated on said wall by its own resilientpressure.

2. A single piece fluid pipe line having -a helicaliy directed spring Wire seated on the.

interior Wall thereof by its own resilient pressure, the `convolutions of the Wire being drawn out and Widely spaced apart whereby the general direction ofthe Wire is longitudi nally of the pipe. ,y l

3. In an apparatus for the method stated, a ipe linev having on its interior Wall a helica ly directed Wire seated by its own resilient. pressure, and means for supplying the lighter 'and heavierfluids to the p1 eline.

' In Witness *whereof We our hands. y JOHN DOVE ISAACS.

JAMES BUCKNER SPEED. Witnesses J. COMPTON,

D. B. RICHARDS.

ave hereunto set 

